assume cs:code,ds:data,ss:stack

code segment
	start:
		mov ax,stack
		mov ss,ax
		mov sp,16
		
		mov ax,data
		mov ds,ax
		
		push ds:[0]
		push ds:[2]
		pop ds:[2]
		pop ds:[0]
		
		mov ax,4c00h
		int 21h
		
code ends

data segment 
		dw 0123h,0456h
data ends

stack segment 
		dw 0,0
stack ends

end start